<?php
global $CFG;
require_once "$CFG->libdir/form/select.php";

/**
 * HTML class for a drop down element to select the grade for an activity,
 * used in mod update form
 *
 * @author	   Jamie Pratt
 * @access	   public
 */
class MoodleQuickForm_modgrade extends MoodleQuickForm_select{


	var $_includenograde=true;
	/**
	 * Class constructor
	 *
	 * @param	 string	Select name attribute
	 * @param	 mixed	 Label(s) for the select
	 * @param	 mixed	 Either a typical HTML attribute string or an associative array
	 * @param	 mixed	 $options ignored
	 * @access	public
	 * @return	void
	 */
	function MoodleQuickForm_modgrade($elementName=null, $elementLabel=null, $attributes=null, $includenograde=true)
	{
		HTML_QuickForm_element::HTML_QuickForm_element($elementName, $elementLabel, $attributes, null);
		$this->_type = 'modgrade';
		$this->_includenograde=$includenograde;

	} //end constructor

	/**
	 * Called by HTML_QuickForm whenever form event is made on this element
	 *
	 * @param	 string	$event  Name of event
	 * @param	 mixed	 $arg	event arguments
	 * @param	 object	$caller calling object
	 * @since	 1.0
	 * @access	public
	 * @return	mixed
	 */
	function onQuickFormEvent($event, $arg, &$caller)
	{
		global $COURSE, $CFG;
		switch ($event) {
			case 'createElement':
				$strscale = get_string('scale');
				$strscales = get_string('scales');
				$scales = get_scales_menu($COURSE->id);
				foreach ($scales as $i => $scalename) {
					$grades[-$i] = $strscale .': '. $scalename;
				}
				if ($this->_includenograde) {
					$grades[0] = get_string('nograde');
				}
				for ($i=100; $i>=1; $i--) {
					$grades[$i] = $i;
				}
				$this->load($grades);
				$linkobject = '<span class="helplink"><img height="17" width="17" alt="'.$strscales.'" src="'.$CFG->pixpath .'/help.gif" /></span>';
				$this->setHelpButton(array('/course/scales.php?id='. $COURSE->id .'&amp;list=true', 'ratingscales',
									 $linkobject, 400, 500, $strscales, 'none', true), 'link_to_popup_window');
				break;
		}
		return parent::onQuickFormEvent($event, $arg, $caller);
	}

}
?>